Jane:
I have used the ECL random prime labelling kit from Amersham (#Cat
RPN3029 contain everything), it works fine and the lebelling of probe
can be tested within 30 min. The geneomic southern works ok although
the sensitivity for none of the ECLs is as high as P32 (5-10 fold
lower). But it is clean, cheap, fast, and the probe can be reused.
good luck.
Chentao Lin